 /*******************************************************************************
  * Copyright (c) 2000, 2005 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.forms.widgets;

 import java.util.Hashtable ;

 import org.eclipse.swt.graphics.FontMetrics;
 import org.eclipse.swt.graphics.GC;
 import org.eclipse.swt.graphics.Rectangle;

 /**
  * This segment serves as break within a paragraph. It has no data -
  * just starts a new line and resets the locator.
  */

 public class BreakSegment extends ParagraphSegment {
     /* (non-Javadoc)
      * @see org.eclipse.ui.forms.internal.widgets.ParagraphSegment#advanceLocator(org.eclipse.swt.graphics.GC, int, org.eclipse.ui.forms.internal.widgets.Locator, java.util.Hashtable)
      */
     public boolean advanceLocator(GC gc, int wHint, Locator locator,
             Hashtable objectTable, boolean computeHeightOnly) {
         if (locator.rowHeight==0) {
             FontMetrics fm = gc.getFontMetrics();
             locator.rowHeight = fm.getHeight();
         }
         if (computeHeightOnly) locator.collectHeights();
         locator.x = locator.indent;
         locator.y += locator.rowHeight;
         locator.rowHeight = 0;
         locator.leading = 0;
         return true;
     }

     public void paint(GC gc, boolean hover, Hashtable resourceTable, boolean selected, SelectionData selData, Rectangle repaintRegion) {
         //nothing to paint
 }
     public boolean contains(int x, int y) {
         return false;
     }
     public boolean intersects(Rectangle rect) {
         return false;
     }
     /* (non-Javadoc)
      * @see org.eclipse.ui.internal.forms.widgets.ParagraphSegment#layout(org.eclipse.swt.graphics.GC, int, org.eclipse.ui.internal.forms.widgets.Locator, java.util.Hashtable, boolean, org.eclipse.ui.internal.forms.widgets.SelectionData)
      */
     public void layout(GC gc, int width, Locator locator, Hashtable ResourceTable,
             boolean selected) {
         locator.resetCaret();
         if (locator.rowHeight==0) {
             FontMetrics fm = gc.getFontMetrics();
             locator.rowHeight = fm.getHeight();
         }
         locator.y += locator.rowHeight;
         locator.rowHeight = 0;
         locator.rowCounter++;
     }

     /* (non-Javadoc)
      * @see org.eclipse.ui.internal.forms.widgets.ParagraphSegment#computeSelection(org.eclipse.swt.graphics.GC, java.util.Hashtable, boolean, org.eclipse.ui.internal.forms.widgets.SelectionData)
      */
     public void computeSelection(GC gc, Hashtable resourceTable, SelectionData selData) {
         selData.markNewLine();
     }
 }

